Chip-type three-dimensional magnetic field sensor

a three-dimensional magnetic field and chip-type technology, applied in the direction of magnetic measurement, instruments, measurement devices, etc., can solve the problems of inability to measure digital current (dc) magnetic fields or magnetic fields with low change rate, fluxgates and proton magnetometers are very serious in energy consumption, and coil sensors have certain limitations
US20220221530A1Active Publication Date: 2022-07-14ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2022-07-14

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Abstract

A chip-type three-dimensional magnetic field sensor includes a light source (1), an input straight waveguide (2), a polarization beam splitting waveguide (3), a 1:1 power beam splitter (4), three 1:2 type Y waveguides, three 2:1 type Y waveguides, three output straight waveguides, three magneto-optical waveguides and three photodetectors. The light source (1) outputs broad-spectrum depolarized light into the input straight waveguide (2), and then the light is divided into TE (transverse electric) polarized light and TM (transverse magnetic) polarized light. The TE polarized light is divided into two beams of TE polarized branch light. The TM polarized light is divided into two beams of TM polarized branch light. One of the two beams of TM polarized branch light is divided into two beams of first TM polarized sub-branch light. Another of the two beams of TM polarized branch light is divided into two beams of second TM polarized sub-branch light.
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Description

CROSS REFERENCE OF RELATED APPLICATION

[0001] This is a U.S. National Stage under 35 U.S.C 371 of the International Application PCT / CN2020 / 086127, filed Apr. 22, 2020, which claims priority under 35 U.S.C. 119(a-d) to CN 201910391741.X, filed May 13, 2019.BACKGROUND OF THE PRESENT INVENTIONField of Invention

[0002] The present invention relates to the field of integrated optical and magnetic field sensing technology, and more particularly to a chip-type three-dimensional magnetic field sensor.Description of Related Arts

[0003] Magnetic field sensors play an important role in many fields such as daily transportation, geophysics, military defense, and biomedicine. For example, the aircraft adopts magnetic field sensors to realize highly reliable contactless information exchange, so as to ensure the flight safety; all kinds of mine resources such as steel, rare metals and non-ferrous metals are able to be located by magnetic field sensors, thereby greatly reducing the cost of prospecting; by...

Claims

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